(B) microwave oven uses electromagnetic waves known as microwaves to heat food. These waves have a frequency typically around $2.45 \ GHz$. When these

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(B) microwave oven uses electromagnetic waves known as microwaves to heat food. These waves have a frequency typically around $2.45 \ GHz$. When these waves are absorbed by water molecules in the food,they cause the molecules to rotate rapidly,generating heat through molecular friction. Therefore,the correct answer is microwaves.

Class 12 Physics Electromagnetic waves Electromagnetic Spectrum

Medium

In a microwave oven,which type of waves are used?

A
Infrared waves
B
Microwaves
C
Radio waves
D
$X$-rays

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Class 12 Questions

Class 12

Physics Questions

Chapter

Electromagnetic waves

Subtopic

Electromagnetic Spectrum

Which of the following is not an electromagnetic wave?

EasyAIPMT 2003

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The decreasing order of wavelength of infrared,microwave,ultraviolet,and gamma rays is:

EasyAIPMT 2011

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Infrared radiation can be detected by $......$.

Easy

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Match List-$I$ with List-$II$:
List-$I$ (Electromagnetic wave) List-$II$ (Production)
$A$. Microwave $I$. Electrons in atoms emit light when they move from a higher energy level to a lower energy level
$B$. Visible light $II$. Radioactive decay of nucleus
$C$. Gamma rays $III$. Vibration of atoms and molecules
$D$. Infra-red rays $IV$. Klystron valve or magnetron valve

Choose the correct answer from the options given below:

List-$I$ (Electromagnetic wave)	List-$II$ (Production)
$A$. Microwave	$I$. Electrons in atoms emit light when they move from a higher energy level to a lower energy level
$B$. Visible light	$II$. Radioactive decay of nucleus
$C$. Gamma rays	$III$. Vibration of atoms and molecules
$D$. Infra-red rays	$IV$. Klystron valve or magnetron valve

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